Combined lock and sight aperture



Nov.

26, 1940-l MMMMMMM AN 2,222,691

mllllllllmIllllllmlllllllmmlllmillmlvllmmllmllmlllIIII I 'Ummm I Mmmm '6@ i E T35 75 m l v KW!" 'mmmm 72 m millmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmmmmmmmmmmmmmm mmmmmmmmmmmmmmm Tm@ 4 ,mimzi Patented Nov. 26, 1940 UNITEDSTATES.

PATENT .orricg 8 Claims.

The invention relates to a combined door lock and associated sight andspeaking tube. It is desirable in some situations as, for instance, inthe entrance' door of an apartment in an apartment house to have a peephole in the door so as to be able to see the party at the door beforeopening the same. Usually, these doors are of expensive stock materialand it is difcult, eX- pensive and often ruinous to the appearance of`the door to provide an opening therein to form the peep hole. Evenafter the door has been cut to provide such a peep hole, the hole mustbe finished and provided with a closure or shutter to maintain thedesired nished appearance to both sides of the door. In most apartmenthouses, the management objects to the disguring of the door by themounting of a peep hole because the doors are usually artisticinappearance and peep holes are usually located in the panel of the doorand thus detract from the appearance intended by the designer. However,all doors must be cut or initially constructed to accommodate a lock ofsome kind so that locks, per se, do not usually detract from theartistic appearance of the door.

'I'he primary object of the invention is to provide a combined speakingand sight tube for a door and which tube is formed as a composite partof the lock and thus can be installed.,in `position with theinstallation of the lock avoiding any necessity of cutting an openingespecially therefor, and vat the same time the invention features theproviding of an artistically appearing structure not noticeably distinctfrom the lock and thus not adding visually to what is usually presentedby the conventional appearance of the door.

Broadly, this aspect of the invention is attained by rearranging thelock mechanism in its casing to provide clearance to accommodate anopening therethrough or to utilize the Vacant space which occurs in somestandard form of door Ylocks to accommodate a tube carried by the lockcasing and associated parts and designed to extend entirely therethroughand through the opening Vin the door which was necessary to accommodatethe lock.

In some standard forms of locks the lock mechanism is actuated on theinside of the door by a rotatably mounted knob or handle journalled `forrotary movement in the lock casing. In `one physical embodimentof thebasic invention herein disclosed, it is proposed to make this knob'oftubular form to form an eye piece disposed in .axial alignment with `abarrel' carriedl (Cl. 'Y0-431) by the front or face plate of the lockcombination to form a combined sight and speaking tube openingthroughthe lock combination and thus through the door on which it is mounted.

Various other objects and advantages of the invention will be in partobvious from an inspection of the accompanying drawing and in part willbe more fully set forth in the following particular description of oneform of door lock embodying the invention, and the invention alsoconsists in certain new and novel features of construction andcombination of parts hereinafter set forth and claimed.

In the accompanying drawing:

Fig. 1 is a view in elevation ofv a lock and its associated strike asviewed from the inner side of the door and provided with a preferredembodiment of the invention equipped with an eye piece shutter shown inclosed position;

Fig. 2 is a vertical sectional view through the lock casing taken on theplane indicated by the line 2 2 of Fig. 3 with part of the cover plateremoved and the balance concealing most of the lock controllingmechanism; v

Fig. 3 is a transverse vertical sectional View taken axially through thesight tube and taken on the plane indicated by the line 3-3 of Fig. 1

looking in the direction indicated by the arrows;k

and

Fig. 4 is a view in front elevation of the structure looking at the samefrom the right hand side of Fig. 3. i

In the drawing, there is shown a lock casing I0 of box-like form havingon its inner side a steel cover plate II demountably secured to thecasing I0 by s crews I2 and which casing as a Whole is mounted on theinner side I3 of a door I4 by exposed screws I5. The casing is providedwith the usual locking bolts I6 designed to engage strike I'I carried bythe door sill as is usual in such structures. The bolts are actuatedthrough mechanism contained in the casing and which includes a train ofgears including at one end a toothed member I 8 meshing with anintermediate gear I9 and in turn meshing with a pinion 20. 'I'heintermediate gear is xed t0 a cylindrical eye piece 2l and journalled inan aperture 22 in the rear wall 23 of the lock casing I0. The gear I9 isthreaded on the eye piece and engages in bearing engagement against theinner face of the wall 23,v the outer face of which wall is'engaged byshoulder 24 formed on the eye piece.

From this construction it is seen that the rearwardly extending portionof the eye piece 2| provides a nger turning knob 25 by means of whichthe gear train is rotated conventionally to actuate the bolts IB. Thepinion 2U is provided with a forwardly extending hub 26 which projectsthrough the cover plate for engagement with a cylinder bar 21 and whichhub projects into the lock receiving opening 28 cut through or formed inthe door. The front end of opening 28 is closed by face plate 29 in thelower portion of which is mounted the key actuated cylinder 30 in therear end of which is lntruded the cylinder bar 21.

It will be understood that this arrangement is of conventional designand arranged so that the proper key inserted in the cylinder will rotatethe cylinder bar and thus through the chain of gears and associatedparts actuate the bolts I6 conventionally. The face plate is held inplace by means of a retaining ring 3l screwed intothe rear side of theface plate and engaging annular flange 32 outlining the front end of theopening through the door. The face plate is provided with an opening 33extending therethrough and which opening is made of as large a diameteras is convenient taking into consideration the size of the lock and theappearance which such an opening would make.

It is herein suggested that one or more bars 34 extend across theopening 33 to form a grid incompletely closing the opening and thus tendto resist the insertion of foreign articles or material into theopening. A barrel 35 of sufficient length to extend between the faceplate 29 and eye piece 2| has its forward end externally threaded asshown at 36 and which threaded end extends through and in threadedengagementwith the retaining ring 3| and with a recess 31 formed in theface plate 29.

From this construction it will be seen that the barrel, front openingand eye piece are inv axial alignment'so that the person applying hiseye to the eye piece at the left of Fig. 3 can. see through the sighttube so provided. In the event that the sight tube is not closed by aglass window or otherwise, the sight tube can be utilized as a speakingtube extending through the door at the lock.

It is desirable when not in use that the sight tube be closed and forthis purpose it is provided at its inner end with a shutter 38 pivotallymounted at 39 to one side of the eye piece and held in closed positionby snugness of fit or in` any other conventional way in which suchclosures are commonly held in either closed or open position.

By means of a device of the character described, it is possible toprovide in a door a peep hole as an inherent part of the lockconstruction and which peep hole, sight cylinder and speaking tube maybe installed in the door without especially providincr an opening forthe same. As the exterior form of the lock herein disclosed does notmaterially differ in appearance from conventional forms of a similarmake of lock, the peep hole or speaking tube aspect of this structure isnot particularly noticeable and the structure can be designed toharmonize with the artistic appearance of the lock and in this way thereis avoided objections which have heretofore been made to peep holeconstructions in doors.

The structure herein featured can be sol-:l as a stock article to iitdoors of varying thicknesses as is usual with known forms of locks, itbeing simply necessary that the barrel 35 be not too long, and even ifthere should be more or less of a gap between the eye piece and barrelit will not interfere with the sighting aspects of the disclosure asspace within the lock opening is dark anyhow.

While there have been shown, described and pointed out in the annexedclaims, certain novel features of the invention, it will be understoodthat various omissions, substitutions and changes in the form anddetails of the device illustrated and in its operation may be made bythose skilled in the art without departing from the spirit of theinvention.

I claim:

1. A lock including a casing provided with means for mounting it on oneside of a door, lock actuating mechanism mounted in the casing andincluding a train of gears, an end element of said train comprising apinion journalled in the casing and including a hub projecting from thecasing, a face plate provided with means for mounting the same on the`opposite side of the door and provided with a key actuated cylinder, acylinder bar connecting with the cylinder and hub for rotary movement,an eye-piece mounted for rotary movement in the casing and providing anexposed handle, a gear constituting an intermediate element of the geartrain xed to the eye piece to rotate therewith by manual rotation of theeye piece handle, a barrel secured to the face plate, with its boreforming a continuation of the bore of the eye piece and coactingtherewith to provide a sight opening extending through the lock casingin olset relation to its lock actuating mechanism.

2. A door lock including parts adapted to extend through `and close theopening provided therefore in a door, said lock including` controlmechanism for actuating the same, said mechanism including a two parttubular member, one part being `rotatably mounted in the lock andprojecting at one end beyond the same to provide 4at said end a handlefor actuating the control mechanism of the lock, said tubular memberhaving a bore forming a combined sight and speaking tube extendingthrough the lock and by means of which a person can see and speakthrough the lock withoutnecessityof providing an opening through thedoor distinct from that necessary for the lock, and a grid lncompletelyclosing `the end of the bore remote from the handle to resist theintrusion of foreign articles into the bore.

3. A door lock including control mechanism for actuating the same, saidmechanism including a two part tubular member, one part being rotat-'ably mounted in the lock and projecting at one end beyond the same toprovide at said end a handle for actuating the control mechanism of thelock, said tubular member having a bore forming a combined sight andspeaking tube extending through the door and by means of which a personcan see andspeak through the door at the lock without necessity ofproviding an opening distinct from that necessary for the lock.

4. A door lock comprising a casing provided with means for mounting thesame on one side of a door, a face plate provided with means formounting the same on the opposite side of a door, the `casing beingprovided with an eye piece and the face plate provided with a barreldisposed in axial alignment with said eye-piece and coacting therewithwhen in position on a door to provide a sight opening extendingthroughthe lock casing, through the door and through the face plate.`

5. A door lock provided with lock mechanism and with a barrel forming aspeaking and sight tube for speaking and looking through the lock, saidtube provided at one end With a closure and with a grating incompletelyclosing the other end of the tube, said tube including a part forming anoperative portion of the lock mechanism.

6. A door lock provided with lock forming elements including meansproviding a key hole and a barrel forming a speaking and sight tubeoffset from said elements for looking through the lock, said tubeprovided at one end with a manually controlled closure :and a casing forcertain of the lock forming elements through which the speaking andsight tube extends.

'7. A door lock provided with means for mounting the same in position ona door and provided With a barrel extending through the door andconstituting a combined speaking and sight tube 20 for looking andspeaking through the lock, said lock including a face plate, a retainingring secured to the face plate and said barrel secured to the retainingring.

8. A door lock for doors of dii-ferent thicknesses, including a faceplate provided with means for securing it to one face of the door, acylinder of a lock having one end mounted in the face plate, said faceplate being provided With an opening extending therethrough, a barrelhaving an unobstructed bore, having one end carried by the face plateand forming a continuation of the opening in the face plate and adaptedto extend through the door, a lock casing provided with means forsecuring it to the opposite face of the door, said casing provided withan eye piece adapted to form a continuation of the barrel, said opening,barrel and eyepiece forming an axially yaligned sight opening extendingthrough the door and offset from the lock cylinder.

MURRAY TAIGMAN.

